Update continuous-integration-workflow.yml

Upgrade .net framework from version 6 to 8

Author: swapnamol-abraham

.github/workflows/continuous-integration-workflow.yml

@@ -12,10 +12,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Setup .NET Core SDK 6.0
+      - name: Setup .NET Core SDK 8.0
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: 6.0.x     
+          dotnet-version: 8.0.x     
 
       - name: Add Azure artifact
         run: dotnet nuget add source 'https://pkgs.dev.azure.com/e-LfH/_packaging/LearningHubFeed/nuget/v3/index.json' --name 'LearningHubFeed'  --username 'kevin.whittaker' --password ${{ secrets.AZURE_DEVOPS_PAT }} --store-password-in-clear-text